Ask a council fleet manager what their fleet costs and you will get a budget figure. Ask what a vehicle off road costs and the answer is usually less precise, which is odd, because on a municipal fleet that is where the money actually goes.
A refuse collection vehicle off road on a scheduled round does not cost the repair. It costs the crew standing, the agency cover, the recovery collection at overtime rates, the calls from residents whose bins were not emptied, and a performance figure that appears in a committee paper. The repair invoice is frequently the smallest line.
This guide covers why vehicle off road time is the fleet metric worth managing, what actually causes it, and the contractual and operational arrangements that bring it down.
Measure It as Days Lost, Not Incidents
Counting breakdowns tells you how often something went wrong. It does not tell you what it cost.
The measure that maps to service delivery is days lost to vehicles off road as a proportion of total available days in the period. That single figure captures both frequency and duration, and it exposes the pattern that incident counts hide: a fleet with few breakdowns but long repair times can be performing far worse than one with more incidents resolved quickly.
Break it down by cause and by vehicle. Cause tells you where to intervene. By vehicle tells you which assets are consuming the availability, and on most fleets a small number of vehicles account for a disproportionate share.
What Actually Causes Downtime
In rough order of impact on a typical municipal fleet: waiting for parts, waiting for a workshop slot, planned maintenance colliding with operational demand, tyres, and finally the mechanical failures everyone thinks of first.
Waiting is the dominant category, and it is a scheduling and supply chain problem rather than an engineering one. A vehicle that is diagnosed on day one and repaired on day four spent three days off road for reasons that have nothing to do with the fault.
Planned maintenance is the most avoidable. An inspection scheduled without reference to the collection calendar takes a vehicle out on a day it was needed, and then gets deferred, and deferral is how planned work becomes unplanned failure.
Tyres deserve separate attention because they are both a compliance risk and a common cause of avoidable downtime, and because tyre management is frequently the least defined part of a maintenance arrangement.
Fix the Scheduling Before the Engineering
The cheapest availability gains usually come from scheduling rather than from better vehicles.
Schedule planned maintenance against the operational calendar, so inspections land on days a vehicle is not needed rather than on collection days. That requires the maintenance provider to have visibility of the operational calendar, which sounds obvious and is frequently not the case.
Agree parts availability expectations explicitly. For predictable consumables and common failure items on a known fleet, a supplier should be holding stock rather than ordering on failure. Ask what is held against your fleet specifically.
Set a response commitment for diagnosis separately from repair, because the two fail differently. A vehicle waiting three days to be looked at is a different problem from one waiting three days for a part, and lumping them into one figure hides which is happening.
Relief Vehicles Are the Real Mitigation
Downtime cannot be eliminated. What can be eliminated is the service impact of downtime, and that is what relief provision does.
Specify relief as an availability commitment rather than as a vehicle sitting somewhere: how many hours to a like-for-like replacement, matched to body specification so a crew can work it without familiarisation, for the categories where a failure stops a public service the same day.
The categories matter. A pool car off road is an inconvenience. A refuse collection vehicle off road on a Monday is a missed round for several thousand households. Relief arrangements should be weighted to where the service impact is, rather than applied uniformly across the fleet.
Arranging relief when it is needed means competing for a vehicle on the morning you can least afford to wait. That is why it belongs in the contract.
Contract Terms That Actually Move the Number
Availability commitments with consequences, rather than best endeavours. A supplier who is measured on days lost behaves differently from one who is measured on jobs completed.
Diagnosis and repair response times stated separately. Parts availability expectations stated explicitly. Relief provision specified as a time commitment for named vehicle categories. Planned maintenance scheduled against an operational calendar the supplier can see.
Reporting that leads with exceptions and with repeat offenders, delivered on the contract cycle rather than on request. A report that arrives late is itself a failure, since the point of it is to allow intervention while intervention is still possible.
And a review rhythm that opens with the vehicles that keep failing, because those are where both the cost and the fix are concentrated.
The Whole Life View
A fleet arrangement chosen on weekly rate alone will usually cost more than one chosen on availability, and the gap is rarely visible in the first year.
The honest comparison includes downtime and the cost of covering it, fuel or energy, tyres, damage recharges, end-of-contract condition charges, and the authority's own staff time spent administering the arrangement. On a refuse fleet, agency crew cover and recovery collections alone can exceed the difference between a cheap and an expensive maintenance arrangement within months.
None of that is an argument for paying more. It is an argument for evaluating on the number that reflects service delivery, and for asking a supplier to commit to it rather than to describe their commitment to it.
Where This Sits in What We Do
The Wild Axis Group provides managed fleet contract hire and maintenance for UK councils and public sector organisations. If you are working through a specification or a procurement and want a straight answer on what is realistic, we are happy to have that conversation before there is anything to quote for.
Frequently Asked Questions
What is a reasonable VOR target for a municipal fleet?
Rather than adopting a number from elsewhere, establish your own baseline first, measured as days lost against total available days, broken down by vehicle category. Fleets differ enormously in age profile, duty cycle and vehicle mix, so a target lifted from another authority is as likely to be unambitious as unachievable. Once a baseline exists, set improvement targets by category and weight them towards the vehicles where downtime stops a public service the same day, since that is where the cost sits.
Should a council do its own maintenance or contract it out?
It depends on workshop capacity, the skills available, and how variable the workload is. An in-house workshop gives control, immediate response and accumulated knowledge of the fleet, but carries fixed cost and struggles with peaks and specialist work. Contracting out converts it to variable cost and buys specialist capability, at the price of scheduling around someone else's priorities. Many authorities run a hybrid, keeping routine work and inspections in house and contracting specialist repairs, which also keeps the option of recharging routine work to a hire provider where the contract allows.
How quickly should a relief vehicle arrive?
Fast enough to protect the service, which means the answer differs by category rather than being a single figure. For a vehicle running a scheduled collection round, the useful commitment is measured in hours on the same day, because the round cannot be postponed. For support and pool vehicles, next working day is usually adequate. Specify the commitment per category rather than uniformly, and specify that the replacement is matched to body specification, because a relief vehicle a crew cannot use is not a relief vehicle.
Does telematics actually reduce downtime?
It can, but only where someone acts on it. The outputs that reduce downtime are utilisation data showing vehicles that are not earning their place, downtime by vehicle and cause showing where to intervene, and driver behaviour data where it correlates with damage or wear. Fault code alerting can catch developing problems before failure. What telematics does not do on its own is change anything, and a dashboard nobody opens is a cost rather than a control. Agree at mobilisation who reviews what and how often.
How does planned maintenance scheduling affect availability?
More than most fleets assume. Inspections scheduled without reference to the operational calendar land on days vehicles are needed, get deferred, and deferred planned work becomes unplanned failure at a worse moment. Giving the maintenance provider visibility of the collection and service calendar, and agreeing which days each category can be released, converts planned maintenance from a source of downtime into a way of preventing it. It is one of the few changes that costs nothing and improves availability immediately.
What should a fleet availability report contain?
Days lost to vehicles off road against total available days for the period, broken down by cause and by vehicle, with the repeat offenders identified explicitly. Alongside that: current vehicles off road, work in progress with expected return dates, planned maintenance compliance, first-time test pass rates, and any hire requests that could not be fulfilled. It should arrive on the contract cycle without being requested, and should lead with exceptions, because completed work needs no action and the report exists to prompt decisions.